ChemInform Abstract: The Generation and Use of a Masked α‐Acyl Cation in Aromatic Substitution Reactions. Ag+‐Induced Reactions of 3‐(Bromomethyl)‐5,6‐dihydro‐1,4,2‐dioxazine Derivatives.
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Abstract Bromination of the alkyldihydrodioxazines (I) with N‐bromosuccinimide in the presence of benzoyl peroxide yields the bromoalkyl derivatives (II) which are substituted to produce the azides (IV) and fluorides (VI).Keywords:
Substitution reaction
Substitution (logic)
Electrophilic aromatic substitution
Abstract For Abstract see ChemInform Abstract in Full Text.
Substitution reaction
Electrophilic aromatic substitution
Electrophilic substitution
Substitution (logic)
Electrophilic addition
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The significance of aromatic and heterocyclic compounds in both industry and academia ensures that investigations into new methods of electrophilic aromatic substitution (EAS) and the underlying mechanisms of such transformations continue to receive considerable attention. Halogenation continues to be an important area of investigation in EAS, and methods where more than one of the halogens can be introduced have been described. Studies on new bromination methods and their mechanisms continue to receive much attention. Hydrogen peroxide has been used in combination with potassium bromide to brominate porphyrins in a biphasic system. New mechanistic insights into iodination methods have been presented. The use of anthraquinone in the presence of TFA as a photocatalyst allows visible-light-promoted iodination of electron-rich arenas. Recent research on the classic and ever important nitration reaction includes computational studies and investigations into greener, more environmentally friendly methods.
Electrophilic aromatic substitution
Electrophilic substitution
Potassium bromide
Environmentally Friendly
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Substitution (logic)
Electrophilic aromatic substitution
Substitution reaction
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Substitution (logic)
Substitution reaction
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Abstract Die Reaktion der Disulfone (I) mit Nucleophilen wie z.B. Morpholin in 60proz. wäßrigem Dioxan liefert die Produkte (II).
Substitution (logic)
Substitution reaction
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Electrophilic aromatic substitutions of hydroxymethylcalix[4]arenas with monosubstituted benzene derivatives give rise to very unusual ortho-selectivities caused by a cavity effect of the calix[4]arenas.
Electrophilic aromatic substitution
Substitution reaction
Electrophilic substitution
Substitution (logic)
Electrophilic addition
Calixarene
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W. H. Mills and I. G. Nixon, J. Chem. Soc., 1930, 2510 DOI: 10.1039/JR9300002510
Substitution (logic)
Electrophilic aromatic substitution
Substitution reaction
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Substitution (logic)
Substitution reaction
Cyclopropane
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Substitution (logic)
Substitution reaction
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In this paper parent substances with molecules which can be divided into a skeleton and six univalent substituents, and that have the properties mentioned in the title, are considered. Two instances are the molecules of benzene and cyclopropane. The Lunn-Senior's symmetry groups of substitution isomerism of these compounds are described and upper bounds of the numbers of their di-substitution and tri-substitution homogeneous derivatives are found. Lists of the possible simple substitution reactions among di-substitution homogeneous derivatives, on one hand, and di-substitution heterogeneous, and tri-substitution homogeneous derivatives, on the other, are given. These substitution reactions allow for some derivatives to be identified with their structural formulae.
Substitution (logic)
Substitution reaction
Cyclopropane
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